On 19 February, her boats landed the[3]2nd Battalion 23rd Marines and their Shore Party, B Co 133 NCB—4th Marine Division on beach "Yellow 2", Iwo Jima,[4] she remained almost a week to offload priority, then request cargo, and to take on board battle casualties. This included her own, for the ship's beach party was hard hit the first day suffering 14 wounded and three missing[5]. Mifflin also sustained a shell hit on her 40mm gun director before retiring with the wounded to Saipan on 28 February.[3]

Having replaced lost equipment and boats, she sailed 16 March, to nearby Tinian to practice for the invasion of Okinawa; in position for this last great assault, on 1 and 2 April, her boats feinted a landing of 2d Division Marines on the southeastern shore to lessen opposition to the main effort on the western beaches.[3]

Again returning her Marines to Saipan, she remained until early June. Steaming to the New Hebrides, Mifflin loaded stores which she discharged 30 June, at Guam. Independence Day, she weighed anchor for San Francisco with a small passenger list and a need for repairs.[3]

Two months later, when she returned to the western Pacific to disembark 1,600 US Army replacement troops at Manila, Philippines, the war had ceased. Mifflin reloaded with men of the 33rd Infantry Division assigned to occupation duty and arrived Wakayama, Japan, 25 September. The next month, over 1,000 troops of the 24th Infantry Division were transported from Mindanao, Philippines, to Okajama, Japan. Sailing to Okinawa 30 October, she engaged in "Magic Carpet" duty from November to March 1946, returning additional thousands of veterans to San Francisco.[3]

1.
Mifflin County, Pennsylvania
–
Mifflin County is a county located in the U. S. state of Pennsylvania. As of the 2010 census, the population was 46,682, the county was created on September 19,1789, from parts of Cumberland County and Northumberland County and named after Thomas Mifflin, the first Governor of Pennsylvania. Mifflin County comprises the Lewistown, PA Micropolitan Statistical Area, according to the U. S. Census Bureau, the county has a total area of 415 square miles, of which 411 square miles is land and 3.7 square miles is water. Mifflin County is located in, and has its boundaries defined by, US Route 322, a major divided highway, connects the county to the rest of the state on its route between Harrisburg and State College. US Route 522 also connects the county to the rest of the state on its route between Selinsgrove and Mount Union, the population density was 112.5 people per square mile. There were 21,537 housing units at a density of 51.9 per square mile. The racial makeup of the county was 97. 53% White,0. 64% Black or African American,0. 11% Native American,0. 36% Asian,0. 01% Pacific Islander,0. 31% from other races, and 1. 03% from two or more races. 1. 14% of the population were Hispanic or Latino of any race,38. 8% were of German,19. 2% American,8. 0% Irish and 7. 5% English ancestry according to Census 2000. 5. 7% report speaking Pennsylvania German, Dutch, or German at home,26. 00% of all households were made up of individuals and 13. 20% had someone living alone who was 65 years of age or older. The average household size was 2.49 and the family size was 2.99. The median age was 39 years, the population was 48. 93% male, and 51. 07% female. The dominant form of speech in Mifflin County is the Central Pennsylvania accent, almost everyone in Mifflin County speaks English. The Amish and some Mennonites speak Pennsylvania German also known as Pennsylvania Dutch, a West Central German dialect, the Amish and Mennonites also can speak English. Few non-Amish or Mennonites in Mifflin County today speak Pennsylvania German, for the Amish and Mennonite settlement, see Kishacoquillas Valley. The United States Office of Management and Budget has designated Mifflin County as the Lewistown, PA Micropolitan Statistical Area. As of the 2010 U. S. Census the micropolitan area ranked 10th most populous in the State of Pennsylvania, Mifflin County School District Mount Union Area School District Head Start is a federally and state funded preschool program for low income children. The program serves 3- and 4-year-olds, in order to participate the family income must be below federal poverty guidelines. Coleman Head Start Center McVeytown Head Start Center Sacred Heart provides a private, belleville Mennonite School, Beth-El Christian Day School, and Valley View Christian School provide Mennonite education through grade twelve

2.
Victory ship
–
The Victory ship was a class of cargo ship produced in large numbers by North American shipyards during World War II to replace losses caused by German submarines. A total of 531 Victory ships were built, one of the first acts of the United States War Shipping Administration upon its formation in February 1942 was to commission the design of what came to be known as the Victory class. The design was an enhancement of the Liberty ship, which had successfully produced in extraordinary numbers. Victory ships were larger than Liberty ships,14 feet longer at 455 feet,6 feet wider at 62 ft. Displacement was up just under 1,000 tons, to 15,200, with a raised forecastle and a more sophisticated hull shape to help achieve the higher speed, they had a quite different appearance from Liberty ships. To make them vulnerable to U-boat attacks, Victory ships made 15 to 17 knots,4 to 6 knots faster than the Libertys. The extra speed was achieved through more modern, efficient engines, most used steam turbines, which had been in short supply earlier in the war and reserved for warships. All were oil-fired, but for a handful of Canadian vessels completed with both coal bunkers and oil tanks, another improvement was electrically powered auxiliary equipment, rather than steam-driven machinery. To prevent the hull fractures that a few Liberty ships developed and these were manned by United States Navy Armed Guard personnel. The VC2-S-AP5 Haskell-class attack transports were armed with the 5-inch stern gun, one quad 40 mm Bofors cannon, four dual 40 mm Bofors cannon, the Haskells were operated and crewed exclusively by U. S. Navy personnel. The Victory ship was noted for good proportion of cubic between holds for a ship of its day. A Victory ships cargo hold one, two and five hatches are a single rigged with a capacity of 70,400,76,700, and 69,500 bale cubic feet respectively. Victory ships hold three and four hatches are double rigged with a capacity of 136,100 and 100,300 bale cubic feet respectively. Victory ship have built in mast, booms and derrick cranes, the first vessel was SS United Victory launched at Oregon Shipbuilding Corporation on 12 January 1944 and completed on 28 February 1944, making her maiden voyage a month later. American vessels frequently had a name incorporating the word Victory, the British and Canadians used Fort and Park respectively. Although initial deliveries were slow—only 15 had been delivered by May 1944—by the end of the war 531 had been constructed, because the Atlantic battle had been won by the time that the first of the Victory ships appeared none were sunk by U-boats. Three were sunk by Japanese kamikaze attack in April of 1945, many Victory ships were converted to troopship to bring US soldiers home at the end of World War II as part of Operation Magic Carpet. A total of 97 Victory ships were converted to carry up to 1,600 soldiers

3.
United States Maritime Commission
–
It also formed the United States Maritime Service for the training of seagoing ships officers to man the new fleet. The purpose of the Maritime Commission was multifold as described in the Merchant Marine Acts Declaration of Policy. S, Merchant Marine prior to the Act. Another function given to the Commission involved the formation of the U. S. Maritime Service for the training of seagoing ships officers to man the new fleet, the actual licensing of officers and seamen still resided with the Bureau of Marine Inspection and Navigation. President Roosevelt nominated Joseph P. Kennedy first head of the Commission, Kennedy held that position until February 1938 when he left to become US Ambassador to Great Britain. The other four members of the Commission in the years before the beginning of World War II were a mix of retired officers and men from disciplines of law. The man most notable in the group Land brought to the Commission was Commander Howard L. Vickery, USN, as a symbol of the rebirth of the U. S. Upon the U. S. entry into World War II, America was requisitioned by the U. S. Navy and became USS West Point. Most of the C2s and C3s were converted to Navy auxiliaries, notably attack cargo ships, attack transports, the Commission also was tasked with the construction of many hundred military type vessels such as Landing Ship, Tank s and Tacoma-class frigates and large troop transports. By the end of the war, U. S. shipyards working under Maritime Commission contracts had built a total of 5,777 oceangoing merchant, in early 1942 both the training and licensing was transferred to the U. S. S. With the end of World War II, both the Emergency and Long Range shipbuilding programs were terminated as there were far too many merchant vessels now for the Nations peacetime needs. In 1946, the Merchant Ship Sales Act was passed to sell off a portion of the ships previously built during the war to commercial buyers. Although not sold outright to nations that were enemies during the war, for the next 25 years, in ports all around the world one could find dozens of ships which had been built during the war but which now were used in peace. Ships not disposed of through the Ship Sales Act were placed one of eight National Defense Reserve Fleet sites maintained on the Atlantic, Pacific. On several occasions in the postwar years ships in the fleets were activated for both military and humanitarian aid missions. The last major mobilization of the NDRF came during the Vietnam War, since then, a smaller fleet of ships called the Ready Reserve Force has been mobilized to support both humanitarian and military missions. The Maritime Commission was abolished on 24 May 1950, and its functions were divided between the U. S. S. Merchant Marine Academy which had built and opened during World War II. 1936, Merchant Marine Act abolishes Shipping Board and establishes Maritime Commission,1937, Joseph P. S. merchant shipping has been held by many agencies since 1917

4.
Richmond, California
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Richmond is a city in western Contra Costa County, California, United States. The city was incorporated on August 7,1905, under the McLaughlin Administration, Richmond was the largest city in the United States served by a Green Party mayor. As of the 2010 U. S. Census, the population is at 103,710. The largest, Richmond, Virginia, is the namesake of the California city, the Ohlone Indians were the first inhabitants of the Richmond area, settling an estimated 5,000 years ago. The name Richmond appears to predate actual incorporation by more than fifty years, the Atchison, Topeka and Santa Fe Railroad had its terminus at Richmond. The first post office opened in 1900, Richmond was founded and incorporated in 1905, carved out of Rancho San Pablo, from which the nearby town of San Pablo inherited its name. Until the enactment of prohibition in 1919, the city had the largest winery in the world, in the 1920s the Ku Klux Klan was active in the city. In 1930 the Ford Motor Company opened a plant called Richmond Assembly Plant which moved to Milpitas in the 1960s. The old Ford plant has been a National Historic Place since 1988, the city was a small town at that time, until the onset of World War II which brought on a rush of migrants and a boom in the industrial sector. Standard Oil set up here in 1901, including a what is now the Chevron Richmond Refinery and tank farm. There is a pier into San Francisco Bay south of Point Molate for oil tankers, the western terminus of the Santa Fe Railroad was established in Richmond with ferry connections at Ferry Point in the Brickyard Cove area of Point Richmond to San Francisco. Many of these lived in specially constructed houses scattered throughout the San Francisco Bay Area, including Richmond, Berkeley. A specially built rail line, the Shipyard Railway, transported workers to the shipyards, kaisers Richmond shipyards built 747 Victory and Liberty ships for the war effort, more than any other site in the U. S. The city broke many records and even built one Liberty ship in a five days. On average the yards could build a ship in thirty days, the medical system established for the shipyard workers at the Richmond Field Hospital eventually became todays Kaiser Permanente HMO. It remained in operation until 1993 when it was replaced by the modern Richmond Medical Center hospital, Point Richmond was originally the commercial hub of the city, but a new downtown arose in the center of the city. It was populated by many department stores such as Kress, J. C. Penney, Sears, Macys, during the war the population increased dramatically and peaked at around 120,000 by the end of the war. Once the war ended the workers were no longer needed

5.
International Code of Signals
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The International Code of Signals is an international system of signals and codes for use by vessels to communicate important messages regarding safety of navigation and related matters. Signals can be sent by flaghoist, signal lamp, flag semaphore, radiotelegraphy, the International Code is the most recent evolution of a wide variety of maritime flag signalling systems. It has done this by first establishing an alphabet, along with a spoken form of each letter. Combinations of these characters are assigned as codes for various standardized messages. One simply raises the Kilo flag, or sends the Morse Code equivalent by flashing light, one of the elegant aspects of the ICS is that all of the standardized messages come in nine languages. It is immaterial if the sender and receiver are using different languages, the code also covers procedural aspects, how naval ships indicate that they are using the ICS, use in radiotelephony, and various other matters. Prior to 1969, the code was more extensive, covering a wider range of messages. Since 1969, it has reduced to focus on navigation and safety. Signals can be sorted into three groups, Single-letter signals which are very urgent, important, or common, two-letter signals for other messages, sometimes followed with a numerical complement which supplements or modifies the message. Three-letter signals beginning with M, these are the Medical Signal Codes, in some cases, additional characters are added to indicate quantities, bearing, course, distance, date, time, latitude, or longitude. There is also provision for spelling words and for indicating use of other codes, several of the more common single-letter signals are shown at the right. Two-letter signals cover a broad gamut of situations, the reader is urged to download a copy of the Code from the link below. Repeated characters can be a problem in flaghoist, to avoid having to carry multiple sets of signal flags, the Code uses three substitute flags. These repeat the flag at the indicated position, for instance, to signal MAA the Mike, Alfa, and 2nd substitute flags would be flown, the substitute indicating a repeat of the second character. The Medical Signal Code is a means of providing assistance when medical personnel are not present, even where there are no language problems, the Medical Signal Code is useful in providing a standard method of case description and treatment. There is also a standard list of medicaments, keyed to a standard ships medicine chest carried by all merchant ships, the Medical signals all begin with the letter M followed by two more letters, and sometimes with additional numerals or letters. The International Code of Signals was preceded by a variety of signals and private signals, most notably Marryats Code. What is now the International Code of Signals was drafted in 1855 by the British Board of Trade and it came in two parts, the first containing universal and international signals, and the second British signals only

6.
Service star
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The service star may also be referred to as a campaign star or battle star depending on which award is authorized the star and the manner in which the device is used for the award. Service stars, Campaign stars, and Battle stars are worn with one point of the star pointing up on the ribbon of a medal. A silver star is worn instead of five bronze stars, a service star is sometimes mistaken for a Bronze Star or Silver Star. The service star is similar to the gold and silver 5⁄16 Inch Stars which may be authorized to be worn on specific individual decorations of certain services to denote additional decorations. Service stars are authorized for the following United States expeditionary medals, Armed Forces Expeditionary Medal, Navy Expeditionary Medal, Service stars are also authorized for the Global War on Terrorism Expeditionary Medal effective February 9,2015 retroactive to September,11,2001. Each star represents a deployment in support of an approved GWOT operation, only one GWOT-EM is awarded for each operation. The five GWOT-EM approved operations by inclusive dates are, Enduring Freedom,11,2001 - TBD Iraqi Freedom, Mar.19,2003 - Aug.31, 2010Nomad Shadow, Nov.05,2007 - TBD New Dawn, Sep. 01,2010 - Dec.31,2011 Inherent Resolve, the bronze service star is also authorized for certain unit awards such as the Presidential Unit Citation to denote a second and subsequent award. The service ribbon itself indicates the first award, with a service star being added to indicate the second. If ever applicable, a service star is worn instead of five bronze stars. As a result, at least one star will be worn on the ribbon. However, though authorized for wear, no battle stars have been approved for wear, only a combatant commander can initiate a request for a battle star. The Chairman of the Joint Chiefs of Staff is the approving authority, only one award of the Global War on Terrorism Expeditionary Medal and one award of the Global War on Terrorism Service Medal may be authorized for any individual. The specific manner of wear and symbolism of the stars varied from medal to medal, for example, an American Campaign Medal with a bronze service star indicated the service member had participated in an antisubmarine campaign. On other medals, bronze service stars were used on the service ribbon for those recipients of medals in possession of authorized campaign claps for those medals. Similarly, during the Vietnam War and afterwards, the Battle Effectiveness Award took the place of receiving battle stars for superior battle efficiency in place of combat operations. Awards and decorations of the United States military United States military award devices 5/16 inch star Oak leaf cluster United States award regulations for World War II

7.
World War II
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World War II, also known as the Second World War, was a global war that lasted from 1939 to 1945, although related conflicts began earlier. It involved the vast majority of the worlds countries—including all of the great powers—eventually forming two opposing alliances, the Allies and the Axis. It was the most widespread war in history, and directly involved more than 100 million people from over 30 countries. Marked by mass deaths of civilians, including the Holocaust and the bombing of industrial and population centres. These made World War II the deadliest conflict in human history, from late 1939 to early 1941, in a series of campaigns and treaties, Germany conquered or controlled much of continental Europe, and formed the Axis alliance with Italy and Japan. Under the Molotov–Ribbentrop Pact of August 1939, Germany and the Soviet Union partitioned and annexed territories of their European neighbours, Poland, Finland, Romania and the Baltic states. In December 1941, Japan attacked the United States and European colonies in the Pacific Ocean, and quickly conquered much of the Western Pacific. The Axis advance halted in 1942 when Japan lost the critical Battle of Midway, near Hawaii, in 1944, the Western Allies invaded German-occupied France, while the Soviet Union regained all of its territorial losses and invaded Germany and its allies. During 1944 and 1945 the Japanese suffered major reverses in mainland Asia in South Central China and Burma, while the Allies crippled the Japanese Navy, thus ended the war in Asia, cementing the total victory of the Allies. World War II altered the political alignment and social structure of the world, the United Nations was established to foster international co-operation and prevent future conflicts. The victorious great powers—the United States, the Soviet Union, China, the United Kingdom, the Soviet Union and the United States emerged as rival superpowers, setting the stage for the Cold War, which lasted for the next 46 years. Meanwhile, the influence of European great powers waned, while the decolonisation of Asia, most countries whose industries had been damaged moved towards economic recovery. Political integration, especially in Europe, emerged as an effort to end pre-war enmities, the start of the war in Europe is generally held to be 1 September 1939, beginning with the German invasion of Poland, Britain and France declared war on Germany two days later. The dates for the beginning of war in the Pacific include the start of the Second Sino-Japanese War on 7 July 1937, or even the Japanese invasion of Manchuria on 19 September 1931. Others follow the British historian A. J. P. Taylor, who held that the Sino-Japanese War and war in Europe and its colonies occurred simultaneously and this article uses the conventional dating. Other starting dates sometimes used for World War II include the Italian invasion of Abyssinia on 3 October 1935. The British historian Antony Beevor views the beginning of World War II as the Battles of Khalkhin Gol fought between Japan and the forces of Mongolia and the Soviet Union from May to September 1939, the exact date of the wars end is also not universally agreed upon. It was generally accepted at the time that the war ended with the armistice of 14 August 1945, rather than the formal surrender of Japan

8.
United States Navy reserve fleets
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The United States Navy maintains a number of its ships as part of a reserve fleet, often called the Mothball Fleet. While the details of the maintenance activity have changed several times, in some cases, many ships were successfully reactivated at a considerable savings in time and money. The usual fate of ships in the fleet, though, is to become too old and obsolete to be of any use. In November 1976, the organization was the Inactive Ship Division of the Naval Ship Systems Command. Since 2004, the organization is called the Navy Inactive Fleet. As of 2011, the organization actually appears to be the Inactive Ships Management Office of the Program Executive Officer - Ships, Naval Sea Systems Command, Portsmouth. Merchant ships held in reserve are managed as part of the separate National Defense Reserve Fleet within MARAD, several of its sites, such as at Suisun Bay in California, are also used to store regular Navy ships. Ships placed in the fleets are categorized depending on priority, funding. Category B Ships in this category are prioritized over the other categories when it comes to maintenance and they are retained for possible future mobilization and will receive updates and upgrades as funding permits. Category C These are ships that will be maintained as-is, meaning no updates or improvements unless funding becomes available after that assigned for category B ships has been exhausted, category D Temporary state pending planned usage by the Navy, will be maintained as-is. Category X Ships stricken from the Naval Vessel Register awaiting disposal, receives no maintenance except ships on donation hold which undergoes dehumidification and cathodic protection. Category Z This category is for nuclear-powered ships and related support ships pending disposal, around 1912, the Atlantic Reserve Fleet and the Pacific Reserve Fleet were established as reserve units, still operating ships, but on a greatly reduced schedule. For example, USS Brock was underway for Green Cove Springs, Florida, Brock arrived there on 13 April 1945, and joined the Florida Group, 16th Fleet, which later became the Florida Group, Atlantic Reserve Fleet. S. These Liberty Ships were also used as the support vessel for its fleet of warships. It was a race between how fast the U. S. could build ships and how fast the German U-Boats could sink them. Most of these Liberty Ships when deactivated were put into mothball fleets strategically located around the coasts of the U. S and they began to be deactivated and scrapped in the early 1970s. The groups of the Atlantic Reserve Fleet were at Boston, Charleston, Green Cove Springs, Florida, New London, MOTBY/New York Harbor, Norfolk, Philadelphia, and Texas. The groups of the Pacific Reserve Fleet were at Alameda, Bremerton, Columbia River, Long Beach, Mare Island, San Diego, San Francisco, Stockton, Tacoma and Olympia, Washington

9.
Maritime Administration
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The United States Maritime Administration is an agency of the United States Department of Transportation. Its programs promote the use of transportation and its seamless integration with other segments of the transportation system. The Maritime Administration works in areas involving ships and shipping, shipbuilding, port operations, vessel operations, national security, environment. On June 4, Deputy Maritime Administrator Paul “Chip” Jaenichen was named Acting Maritime Administrator and he will serve in this role until the appointment and confirmation of a new Maritime Administrator. On August 6,1981, MARAD came under control of the Department of Transportation thereby bringing all transportation programs under one cabinet-level department, MARAD administers financial programs to develop, promote, and operate the U. S. Maritime Service and the U. S. S. Documented vessels to foreign registries, maintains equipment, shipyard facilities, the Maritime Subsidy Board negotiates contracts for ship construction and grants operating-differential subsidies to shipping companies. The Maritime Security Program authorizes MARAD to enter contracts with U. S. -flag commercial ship owners to provide service during times of war or national emergencies. As of 2007, ten companies have signed contracts providing the MSP with a reserve of sixty cargo vessels, United States Maritime Service, a training organization for the U. S

10.
Suisun Bay Reserve Fleet
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The Suisun Bay Reserve Fleet is located on the northwest side of Suisun Bay. The fleet is within a regulated navigation area that is about 4 1/2 miles long and it begins just north of the Union Pacific Railroad Bridge and runs northeast, parallel to the shoreline. Water depths range from about 14 meters at Mean Lower Low Water at the foot of the anchorage, the U. S. Maritime Administration maintains the National Defense Reserve Fleet, a fleet of vessels that serve as a reserve of ships for national defense and national emergency purposes. The reserve fleet program was begun in 1946 at the end of World War II, at its peak in 1950, the program had more than 2,000 ships in lay-up. One of the reserve fleet storage sites is in Suisun Bay, only a small portion of vessels currently remain with the Suisun Bay Reserve Fleet. In January 2016, the Department of Transportation and MARAD have officially announced the closure in February 2017. All remaining ships will be sold at auction or scrapped, the State of California and several environmental groups have raised concerns about the environmental impacts of the fleet. Potential concerns include heavy metals and anti-fouling agents in the paint that is peeling off of the vessels, as well as PCBs, congress responded to these concerns by funding the National Oceanic and Atmospheric Administration to design and implement a study of contaminants in the vicinity of the fleet. NOAAs Damage Assessment, Response and Restoration Program began work on this project in January 2008, NOAA deployed bivalve samples in June 2008 and collected sediment and bivalve tissue samples from the area in July 2008. A second field sampling event for additional tissue samples occurred in September and these samples were analyzed and a data report was delivered in early 2009. S. Department of Transportation’s Maritime Administration at the Suisun Bay Reserve Fleet site, under the agreement, MARAD will clean, maintain, and dispose of these ships in a manner that eliminates sources of Bay pollution. The Maritime Administration has already begun removing obsolete ships from Suisun Bay for recycling— several ships have left since November 2009, a total of 10 ships remain. Under the terms of the settlement, Hazardous paint debris collected on vessel decks will be removed within 120 days, all the obsolete ships currently located at the site will be cleaned of flaking paint within 2 years. Twenty-eight ships in the worst condition will be removed for disposal by September 30,2012, before their removal, these ships will be sent to a local drydock for cleaning. All the obsolete ships currently located at the site will be removed for disposal by September 30,2017, prior to removal, the ships will be maintained according to locally approved best management practices, as monitored by the Regional Board. No new ships with excess flaking paint will be admitted to the fleet site

11.
Haskell-class attack transport
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Haskell-class attack transports were amphibious assault ships of the United States Navy created in 1944. They were designed to transport 1,500 troops and their combat equipment, the Haskells were very active in the World War II Pacific Theater of Operations, landing Marines and Army troops and transporting casualties at Iwo Jima and Okinawa. Ships of the class were among the first Allied ships to enter Tokyo Bay at the end of World War II, after the end of World War II, most participated in Operation Magic Carpet, the massive sealift of US personnel back to the United States. A few of the Haskell class were reactivated for the Korean War, the Haskell class, Maritime Commission standard type VC2-S-AP5, is a sub‑type of the World War II Victory ship design. 117 were launched in 1944 and 1945, with 14 more being finished as another VC2 type or canceled, the VC2-S-AP5 design was intended for the transport and assault landing of over 1,500 troops and their heavy combat equipment. During Operation Magic Carpet, up to 1,900 personnel per ship were carried homeward, the Haskells carried 25 landing craft to deliver the troops and equipment right onto the beach. The 23 main boats were the 36 feet long, LCVP, the LCVP was designed to carry 36 equipped troops. The other 2 landing craft were the 50 foot long LCM, capable of carrying 60 troops or 30 tons of cargo, the Haskell-class ships were armed with one 5/38 caliber gun, twelve Bofors 40 mm guns, and ten Oerlikon 20 mm guns. See List of Haskell-class attack transports, Haskell-class attack transports included APA-117, USS Haskell, the lead ship, through APA-247, the never completed USS Mecklenburg. The hulls for APA-181 through APA-186 were repurposed to be hospital ships before they were named, ultimately those hospital ships were built on larger C4 plan and the six VC2 hulls were built in a merchant configuration. APA-240 through APA-247 were named, but cancelled in 1945 when the war ended, with the special exception of the USS Marvin H. McIntyre, the Haskell-class ships were all named after counties of the United States. Most of the Haskell-class ships were mothballed in 1946, with only a few remaining in service, many of the Haskell class were scrapped in 1973-75. A few were converted into Missile Range Instrumentation Ships, the USS Gage, the last remaining ship in the Haskell configuration, was scrapped in 2009 at ESCO Marine, in Brownsville, Tx. The USS Sherburne, which was converted and renamed USS Range Sentinel, lasted until she was scrapped in 2012

12.
Attack transport
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Attack transport is a United States Navy ship classification for a variant of ocean-going troopship adapted to transporting invasion forces ashore. Unlike standard troopships – often drafted from commercial shipping fleets – that rely on either a quay or tenders and they are not to be confused with landing ships, which beach themselves to bring their troops directly ashore, or their general British equivalent, the Landing ship, infantry. A total of 388 APA and AKA attack transports were built for service in World War II in at least fifteen classes, depending on class they were armed with one or two 5-inch guns and a variety of 40 mm and 20 mm anti-aircraft weapons. Some of these were outfitted with heavy boat davits and other arrangements to enable them to handle landing craft] for amphibious assault operations. In 1942, when the AP number series had extended beyond 100. Therefore, the new classification of attack transport was created and numbers assigned to fifty-eight APs then in commission or under construction, the actual reclassification of these ships was not implemented until February 1943, by which time two ships that had APA numbers assigned had been lost. Another two transports sunk in 1942, USS George F. Elliott and USS Leedstown, were configured as attack transports. In addition, as part of the 1950s modernization of the Navys amphibious force with faster ships, as a result, only attack transport ships were assigned for the assault, without support from any companion attack cargo ships. This created extreme logistics burdens for the force because it resulted in considerable overloading of the transports with both men and equipment. To compound problems, these forces were not able to assemble or train together before executing the Aleutian invasion on 11 May 1943, lack of equipment and training subsequently resulted in confusion during the landings on Attu. By the end of the 1950s, it was clear that boats would soon be superseded by amphibious tractors and helicopters for landing assault troops. These could not be supported by attack transports in the numbers required, by 1969, when the surviving attack transports were redesignated LPA, only a few remained in commissioned service. The last of these were decommissioned in 1980 and sold abroad, the APA/LPA designation may, therefore, now be safely considered extinct. Nearly identical ships used to transport vehicles, supplies and landing craft, Landing Ship Infantry This article incorporates text from the public domain Dictionary of American Naval Fighting Ships. APA/LPA -- Attack Transports by the US Naval Historical Center

13.
Tonne
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The SI symbol for the tonne is t, adopted at the same time as the unit itself in 1879. Its use is also official, for the metric ton, within the United States, having been adopted by the US National Institute of Standards and it is a symbol, not an abbreviation, and should not be followed by a period. Informal and non-approved symbols or abbreviations include T, mT, MT, in French and all English-speaking countries that are predominantly metric, tonne is the correct spelling. Before metrication in the UK the unit used for most purposes was the Imperial ton of 2,240 pounds avoirdupois, equivalent to 1,016 kg, differing by just 1. 6% from the tonne. Ton and tonne are both derived from a Germanic word in use in the North Sea area since the Middle Ages to designate a large cask. A full tun, standing about a high, could easily weigh a tonne. An English tun of wine weighs roughly a tonne,954 kg if full of water, in the United States, the unit was originally referred to using the French words millier or tonneau, but these terms are now obsolete. The Imperial and US customary units comparable to the tonne are both spelled ton in English, though they differ in mass, one tonne is equivalent to, Metric/SI,1 megagram. Equal to 1000000 grams or 1000 kilograms, megagram, Mg, is the official SI unit. Mg is distinct from mg, milligram, pounds, Exactly 1000/0. 453 592 37 lb, or approximately 2204.622622 lb. US/Short tons, Exactly 1/0. 907 184 74 short tons, or approximately 1.102311311 ST. One short ton is exactly 0.90718474 t, imperial/Long tons, Exactly 1/1. 016 046 9088 long tons, or approximately 0.9842065276 LT. One long ton is exactly 1.0160469088 t, for multiples of the tonne, it is more usual to speak of thousands or millions of tonnes. Kilotonne, megatonne, and gigatonne are more used for the energy of nuclear explosions and other events. When used in context, there is little need to distinguish between metric and other tons, and the unit is spelt either as ton or tonne with the relevant prefix attached. *The equivalent units columns use the short scale large-number naming system used in most English-language countries. †Values in the equivalent short and long tons columns are rounded to five significant figures, ǂThough non-standard, the symbol kt is also sometimes used for knot, a unit of speed for sea-going vessels, and should not be confused with kilotonne. A metric ton unit can mean 10 kilograms within metal trading and it traditionally referred to a metric ton of ore containing 1% of metal. In the case of uranium, the acronym MTU is sometimes considered to be metric ton of uranium, in the petroleum industry the tonne of oil equivalent is a unit of energy, the amount of energy released by burning one tonne of crude oil, approximately 42 GJ

14.
Combustion Engineering
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Originally headquartered in New York City, C-E moved its corporate offices to Stamford, Connecticut in 1973. C-E owned over three other companies including Lummus Company, National Tank Company and the Morgan Door Company. Former workers have gone on to leadership positions in major engineering firms. The company was acquired by Asea Brown Boveri in early 1990, the boiler and fossil fuel businesses were purchased by Alstom in 2000, and the nuclear business was purchased by Westinghouse Electric Company also in 2000. Combustion Engineering was organized in 1912 through the merger of the Grieve Grate Company, the company was originally headquartered on 11 Broadway and at 43 -5 -7 Broad Street, both in Lower Manhattan. The city block was leased from the Alliance Realty Company in April 1920, in May of the same year the firm began construction of an eight story office building on the same site. During the 1920s, C-Es signature boiler equipment was the English designed Type-E stoker, C-E also offered several other types of underfeed stokers in addition to the Type-E. During the 1920s, all of C-Es stokers were fabricated in manufacturing plants along the Monongahela River south of Pittsburgh, in 1925 C-E entered the steam boiler business, beginning with a steam boiler installed at the Ford Motor Companys River Rouge Plant in Dearborn, MI. C-E also acquired two companies in Chattanooga, TN to augment its manufacturing capabilities. In the 1970s C-E acquired the first Recycling Wire Granulation System from a young entrepreneur/inventor, the stripped alloy would go into a containment device and the dross would go into another. Both to be recycled, therefore avoiding the rapidly overflowing landfills, during the Great Depression, C-E formed a partnership with the Superheater Company. The Locomotive Superheater Company was founded in 1910 to further the use of superheated steam in locomotives, the Superheater Companys primary manufacturing facility was located in East Chicago, Indiana. In December 1948 stockholders approved a merger between the Combustion Engineering Company and Superheater Company, following consolidation the corporation was called Combustion Engineering-Superheater Inc. In September 1950 the firm announced plans to build a large high-pressure generating unit for Virginia Electric & Power Company in Chester, in 1953, the name Superheater was eliminated and the company took the more familiar name - Combustion Engineering, Inc. At this time, C-E primarily designed and built boiler assemblies for conventional power plants, in the mid-1950s, C-E also expanded its operations into oil and gas exploration, production, refining, and petrochemicals with the acquisition of the Lummus Company located in Bloomfield, NJ. Lummus also supplied small industrial steam systems for oil field enhanced recovery. C-E was one of the suppliers of boilers for US Navy steam-powered warships. Amongst many other warships, all of the 46 Knox class frigates built during the 1960s and 1970s were equipped with a 1200 PSI C-E power plant, C-E also was a leader in the development of large coal utility steam supply systems which were used worldwide

15.
Boiler
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A boiler is a closed vessel in which water or other fluid is heated. The fluid does not necessarily boil, the heated or vaporized fluid exits the boiler for use in various processes or heating applications, including water heating, central heating, boiler-based power generation, cooking, and sanitation. The pressure vessel of a boiler is usually made of steel, stainless steel, especially of the austenitic types, is not used in wetted parts of boilers due to corrosion and stress corrosion cracking. In live steam models, copper or brass is used because it is more easily fabricated in smaller size boilers. For much of the Victorian age of steam, the material used for boilermaking was the highest grade of wrought iron. In the 20th century, design practice instead moved towards the use of steel, which is stronger and cheaper, with welded construction, which is quicker and requires less labour. It should be noted, however, that wrought iron boilers corrode far slower than their steel counterparts. This makes the longevity of older wrought-iron boilers far superior to those of welded steel boilers, cast iron may be used for the heating vessel of domestic water heaters. Although such heaters are usually termed boilers in some countries, their purpose is usually to produce hot water, not steam, the brittleness of cast iron makes it impractical for high-pressure steam boilers. The source of heat for a boiler is combustion of any of several fuels, such as wood, coal, oil, electric steam boilers use resistance- or immersion-type heating elements. Nuclear fission is used as a heat source for generating steam, either directly or, in most cases. Heat recovery steam generators use the heat rejected from other such as gas turbine. 18th century Haycock boilers generally produced and stored large volumes of very low-pressure steam and these could burn wood or most often, coal. Flued boiler with one or two large flues—an early type or forerunner of fire-tube boiler, fire-tube boiler, Here, water partially fills a boiler barrel with a small volume left above to accommodate the steam. This is the type of boiler used in nearly all steam locomotives, the heat source is inside a furnace or firebox that has to be kept permanently surrounded by the water in order to maintain the temperature of the heating surface below the boiling point. Fire-tube boilers usually have a low rate of steam production. Fire-tube boilers mostly burn solid fuels, but are adaptable to those of the liquid or gas variety. Water-tube boiler, In this type, tubes filled with water are arranged inside a furnace in a number of possible configurations and this type generally gives high steam production rates, but less storage capacity than the above

16.
Pounds per square inch
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The pound per square inch or, more accurately, pound-force per square inch is a unit of pressure or of stress based on avoirdupois units. Now converting the psi to standard atmospheres,1 atm =101325 Pa =101325 Pa 6894.757293168 Pa / psi ≈14.70 psi Therefore,1 atmosphere is approximately 14.7 pounds per square inch. Pounds per square inch absolute is used to make it clear that the pressure is relative to a rather than the ambient atmospheric pressure. Since atmospheric pressure at sea level is around 14.7 psi, the converse is pounds per square inch gauge or pounds per square inch gage, indicating that the pressure is relative to atmospheric pressure. For example, a bicycle tire pumped up to 65 psi above atmospheric pressure. When gauge pressure is referenced to something other than ambient atmospheric pressure, the kilopound per square inch is a scaled unit derived from psi, equivalent to a thousand psi. Ksi are not widely used for gas pressures and they are mostly used in materials science, where the tensile strength of a material is measured as a large number of psi. The conversion in SI Units is 1 ksi =6.895 MPa, the megapound per square inch is another multiple equal to a million psi. It is used in mechanics for the modulus of the materials. The conversion in SI Units is 1 Mpsi =6.895 GPa, inch of water,0.036 psid Blood pressure – clinically normal human blood pressure,2.32 psig/1.55 psig Natural gas residential piped in for consumer appliance, 4–6 psig. Boost pressure provided by a turbocharger, 6–15 psig NFL football,12. 5–13.5 psig Atmospheric pressure at sea level,14

17.
Pascal (unit)
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The pascal is the SI derived unit of pressure used to quantify internal pressure, stress, Youngs modulus and ultimate tensile strength. It is defined as one newton per square meter and it is named after the French polymath Blaise Pascal. Common multiple units of the pascal are the hectopascal which is equal to one millibar, the unit of measurement called standard atmosphere is defined as 101,325 Pa and approximates to the average pressure at sea-level at the latitude 45° N. Meteorological reports typically state atmospheric pressure in hectopascals, the unit is named after Blaise Pascal, noted for his contributions to hydrodynamics and hydrostatics, and experiments with a barometer. The name pascal was adopted for the SI unit newton per square metre by the 14th General Conference on Weights, one pascal is the pressure exerted by a force of magnitude one newton perpendicularly upon an area of one square metre. The unit of measurement called atmosphere or standard atmosphere is 101325 Pa and this value is often used as a reference pressure and specified as such in some national and international standards, such as ISO2787, ISO2533 and ISO5024. In contrast, IUPAC recommends the use of 100 kPa as a standard pressure when reporting the properties of substances, geophysicists use the gigapascal in measuring or calculating tectonic stresses and pressures within the Earth. Medical elastography measures tissue stiffness non-invasively with ultrasound or magnetic resonance imaging, in materials science and engineering, the pascal measures the stiffness, tensile strength and compressive strength of materials. In engineering use, because the pascal represents a small quantity. The pascal is also equivalent to the SI unit of energy density and this applies not only to the thermodynamics of pressurised gases, but also to the energy density of electric, magnetic, and gravitational fields. In measurements of sound pressure, or loudness of sound, one pascal is equal to 94 decibels SPL, the quietest sound a human can hear, known as the threshold of hearing, is 0 dB SPL, or 20 µPa. The airtightness of buildings is measured at 50 Pa, the units of atmospheric pressure commonly used in meteorology were formerly the bar, which was close to the average air pressure on Earth, and the millibar. Since the introduction of SI units, meteorologists generally measure pressures in hectopascals unit, exceptions include Canada and Portugal, which use kilopascals. In many other fields of science, the SI is preferred, many countries also use the millibar or hectopascal to give aviation altimeter settings. In practically all fields, the kilopascal is used instead. Centimetre of water Metric prefix Orders of magnitude Pascals law

18.
Westinghouse Electric Corporation
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The Westinghouse Electric Corporation was an American manufacturing company. It was founded on January 8,1886, as Westinghouse Electric Company and later renamed Westinghouse Electric Corporation by inventor, George Westinghouse had previously founded the Westinghouse Air Brake Company. The corporation purchased CBS broadcasting company in 1995 and became CBS Corporation in 1997, Westinghouse Electric was founded by George Westinghouse in Pittsburgh, Pennsylvania in 1886. The firm became active in developing electric infrastructure throughout the United States, in addition to George Westinghouse, early engineers working for the company included Frank Conrad, Benjamin Garver Lamme, Oliver B. Shallenberger, William Stanley, Nikola Tesla, Stephen Timoshenko and Vladimir Zworykin, early on Westinghouse was a rival to Thomas Edisons electric company. In 1892 Edison was merged with Westinghouses chief AC rival, the Thomson-Houston Electric Company, making even bigger competitor, Westinghouse changed its name to Westinghouse Electric Corporation in 1945. Westinghouse purchased CBS in 1995 and became CBS Corporation in 1997, in 1998, CBS established a brand licensing subsidiary Westinghouse Licensing Corporation. In 1997/1998 the Power Generation Business Unit, headquartered in Orlando, FL, was sold to Siemens AG, a year later, CBS sold all of its nuclear power businesses to British Nuclear Fuels Limited. Soon after, BNFL gained license rights on the Westinghouse trademarks and that company was sold to Toshiba in 2007. The first commercial Westinghouse steam turbine generator, a 1,500 kW unit. The machine, nicknamed Mary-Ann, was the first steam turbine generator to be installed by a utility to generate electricity in the US. George Westinghouse had based his original steam turbine design on designs licensed from the English inventor Charles Parsons. or were built overseas under Westinghouse license. Major Westinghouse licensees or joint venture partners included Mitsubishi Heavy Industries of Japan and Harbin Turbine Co. Westinghouse boasted 50,000 employees by 1900, and established a formal research and development department in 1906. While the company was expanding, it would experience internal financial difficulties, during the Panic of 1907, the Board of Directors forced George Westinghouse to take a six-month leave of absence. Westinghouse officially retired in 1909 and died years later in 1914. Under new leadership, Westinghouse Electric diversified its business activities in electrical technology and it acquired the Copeman Electric Stove Company in 1914 and Pittsburgh High Voltage Insulator Company in 1921. Westinghouse also moved into broadcasting by establishing Pittsburghs KDKA, the first commercial radio station. Westinghouse expanded into the business, establishing the Westinghouse Elevator Company in 1928

19.
Steam turbine
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A steam turbine is a device that extracts thermal energy from pressurized steam and uses it to do mechanical work on a rotating output shaft. Its modern manifestation was invented by Sir Charles Parsons in 1884, in 1551, Taqi al-Din in Ottoman Egypt described a steam turbine with the practical application of rotating a spit. Steam turbines were described by the Italian Giovanni Branca and John Wilkins in England. The devices described by Taqi al-Din and Wilkins are today known as steam jacks, in 1672 an impulse steam turbine driven car was designed by Ferdinand Verbiest. A more modern version of car was produced some time in the late 18th century by an unknown German mechanic. The modern steam turbine was invented in 1884 by Sir Charles Parsons, the invention of Parsons steam turbine made cheap and plentiful electricity possible and revolutionized marine transport and naval warfare. Parsons design was a reaction type and his patent was licensed and the turbine scaled-up shortly after by an American, George Westinghouse. The Parsons turbine also turned out to be easy to scale up. Parsons had the satisfaction of seeing his invention adopted for all major world power stations, a number of other variations of turbines have been developed that work effectively with steam. The de Laval turbine accelerated the steam to full speed before running it against a turbine blade, De Lavals impulse turbine is simpler, less expensive and does not need to be pressure-proof. It can operate with any pressure of steam, but is less efficient. He taught at the École des mines de Saint-Étienne for a decade until 1897, one of the founders of the modern theory of steam and gas turbines was Aurel Stodola, a Slovak physicist and engineer and professor at the Swiss Polytechnical Institute in Zurich. His work Die Dampfturbinen und ihre Aussichten als Wärmekraftmaschinen was published in Berlin in 1903, a further book Dampf und Gas-Turbinen was published in 1922. It was used in John Brown-engined merchant ships and warships, including liners, the present-day manufacturing industry for steam turbines is dominated by Chinese power equipment makers. Other manufacturers with minor market share include Bhel, Siemens, Alstom, GE, Doosan Škoda Power, Mitsubishi Heavy Industries, the consulting firm Frost & Sullivan projects that manufacturing of steam turbines will become more consolidated by 2020 as Chinese power manufacturers win increasing business outside of China. There are several classifications for modern steam turbines, Turbine blades are of two basic types, blades and nozzles. Blades move entirely due to the impact of steam on them and this results in a steam velocity drop and essentially no pressure drop as steam moves through the blades. A turbine composed of alternating with fixed nozzles is called an impulse turbine, Curtis turbine, Rateau turbine

20.
Propeller
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A propeller is a type of fan that transmits power by converting rotational motion into thrust. A pressure difference is produced between the forward and rear surfaces of the blade, and a fluid is accelerated behind the blade. Their disadvantages are higher mechanical complexity and higher cost, the principle employed in using a screw propeller is used in sculling. It is part of the skill of propelling a Venetian gondola but was used in a less refined way in parts of Europe. For example, propelling a canoe with a paddle using a pitch stroke or side slipping a canoe with a scull involves a similar technique. In China, sculling, called lu, was used by the 3rd century AD. In sculling, a blade is moved through an arc. The innovation introduced with the propeller was the extension of that arc through more than 360° by attaching the blade to a rotating shaft. Propellers can have a blade, but in practice there are nearly always more than one so as to balance the forces involved. The origin of the screw propeller starts with Archimedes, who used a screw to lift water for irrigation and bailing boats and it was probably an application of spiral movement in space to a hollow segmented water-wheel used for irrigation by Egyptians for centuries. Leonardo da Vinci adopted the principle to drive his theoretical helicopter, in 1784, J. P. Paucton proposed a gyrocopter-like aircraft using similar screws for both lift and propulsion. At about the time, James Watt proposed using screws to propel boats. This was not his own invention, though, Toogood and Hays had patented it a century earlier, by 1827, Czech-Austrian inventor Josef Ressel had invented a screw propeller which had multiple blades fastened around a conical base. He had tested his propeller in February 1826 on a ship that was manually driven. He was successful in using his bronze screw propeller on an adapted steamboat and his ship Civetta with 48 gross register tons, reached a speed of about six knots. This was the first ship successfully driven by an Archimedes screw-type propeller, after a new steam engine had an accident his experiments were banned by the Austro-Hungarian police as dangerous. Josef Ressel was at the time a forestry inspector for the Austrian Empire, but before this he received an Austro-Hungarian patent for his propeller. This new method of propulsion was an improvement over the paddlewheel as it was not so affected by either ship motions or changes in draft as the burned coal

21.
Knot (unit)
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The knot is a unit of speed equal to one nautical mile per hour, approximately 1.151 mph. The ISO Standard symbol for the knot is kn, the same symbol is preferred by the IEEE, kt is also common. The knot is a unit that is accepted for use with the SI. Etymologically, the term derives from counting the number of knots in the line that unspooled from the reel of a log in a specific time. 1 international knot =1 nautical mile per hour,1.852 kilometres per hour,0.514 metres per second,1.151 miles per hour,20.254 inches per second,1852 m is the length of the internationally agreed nautical mile. The US adopted the definition in 1954, having previously used the US nautical mile. The UK adopted the international nautical mile definition in 1970, having used the UK Admiralty nautical mile. The speeds of vessels relative to the fluids in which they travel are measured in knots, for consistency, the speeds of navigational fluids are also measured in knots. Thus, speed over the ground and rate of progress towards a distant point are given in knots. Until the mid-19th century, vessel speed at sea was measured using a chip log, the chip log was cast over the stern of the moving vessel and the line allowed to pay out. Knots placed at a distance of 8 fathoms -47 feet 3 inches from each other, passed through a sailors fingers, the knot count would be reported and used in the sailing masters dead reckoning and navigation. This method gives a value for the knot of 20.25 in/s, the difference from the modern definition is less than 0. 02%. On a chart of the North Atlantic, the scale varies by a factor of two from Florida to Greenland, a single graphic scale, of the sort on many maps, would therefore be useless on such a chart. Recent British Admiralty charts have a latitude scale down the middle to make this even easier, speed is sometimes incorrectly expressed as knots per hour, which is in fact a measure of acceleration. Prior to 1969, airworthiness standards for aircraft in the United States Federal Aviation Regulations specified that distances were to be in statute miles. In 1969, these standards were amended to specify that distances were to be in nautical miles. At 11000 m, an airspeed of 300 kn may correspond to a true airspeed of 500 kn in standard conditions. Beaufort scale Hull speed, which deals with theoretical estimates of maximum speed of displacement hulls Knot count Knotted cord Metre per second Orders of magnitude Rope Kemp

22.
Kilometres per hour
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The kilometre per hour is a unit of speed, expressing the number of kilometres travelled in one hour. Worldwide, it is the most commonly used unit of speed on road signs, the Dutch on the other hand adopted the kilometre in 1817 but gave it the local name of the mijl. The SI representations, classified as symbols, are km/h, km h−1 and km·h−1, the use of abbreviations dates back to antiquity, but abbreviations for kilometres per hour did not appear in the English language until the late nineteenth century. The kilometre, a unit of length, first appeared in English in 1810, kilometres per hour did not begin to be abbreviated in print until many years later, with several different abbreviations existing near-contemporaneously. For example, news organisations such as Reuters and The Economist require kph, in Australian unofficial usage, km/h is sometimes pronounced and written as klicks or clicks. The use of symbols to replace words dates back to at least the medieval era when Johannes Widman, writing in German in 1486. In the early 1800s Berzelius introduced a symbolic notation for the chemical elements derived from the elements Latin names, typically, Na was used for the element sodium and H2O for water. In 1879, four years after the signing of the Treaty of the Metre, among these were the use of the symbol km for kilometre. In 1948, as part of its work for the SI. The SI explicitly states that unit symbols are not abbreviations and are to be using a very specific set of rules. Hence the name of the unit can be replaced by a kind of algebraic symbol and this symbol is not merely an abbreviation but a symbol which, like chemical symbols, must be used in a precise and prescribed manner. SI, and hence the use of km/h has now been adopted around the world in areas related to health and safety. It is also the system of measure in academia and in education. During the early years of the car, each country developed its own system of road signs. In 1968 the Vienna Convention on Road Signs and Signals was drawn up under the auspices of the United Nations Economic, many countries have since signed the convention and adopted its proposals. The use of SI implicitly required that states use km/h as the shorthand for kilometres per hour on official documents. Examples include, Dutch, kilometer per uur, Portuguese, quilómetro por hora Greek, in 1988 the United States National Highway Traffic Safety Administration promulgated a rule stating that MPH and/or km/h were to be used in speedometer displays. On May 15,2000 this was clarified to read MPH, or MPH, however, the Federal Motor Vehicle Safety Standard number 101 allows any combination of upper- and lowercase letters to represent the units

23.
Miles per hour
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Miles per hour is an imperial and United States customary unit of speed expressing the number of statute miles covered in one hour. Miles per hour is the also used in the Canadian rail system. In some countries mph may be used to express the speed of delivery of a ball in sporting events such as cricket, tennis, road traffic speeds in other countries are indicated in kilometres per hour, while occasionally both systems are used. For example, in Ireland, a considered a speeding case by examining speeds in both kilometres per hour and miles per hour. The judge was quoted as saying the speed seemed very excessive at 180 km/h but did not look as bad at 112 mph, nautical and aeronautical applications, however, favour the knot as a common unit of speed. 1 Mph =0.000277778 Mps Example, Apollo 11 attained speeds of 25,000 Mph, if Apollo 11 were to travel at 25,000 Mph from New York to Los Angeles it would reach Los Angeles in under 6 minutes

24.
Landing Craft Mechanized
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The landing craft mechanized also landing craft mechanical is a landing craft designed for carrying vehicles. They came to prominence during the Second World War when they were used to land troops or tanks during Allied amphibious assaults. There was no design of LCM used, unlike the landing craft, vehicle, personnel or landing craft assault landing craft made by the US. There were several different designs built by the UK and US, the British motor landing craft was conceived and tested in the 1920s and was used from 1924 in exercises. It was the first purpose built landing craft. It was the progenitor of all subsequent LCM designs, the landing craft, mechanised Mark I was an early British model. It was able to be slung under the davits of a liner or on a cargo ship boom with the result that it was limited to a 16-ton tank, the LCM Mark I was used during the Allied landings in Norway, and at Dieppe and some 600 were built. Displacement,35 tonnes Length,13.6 m Width,4.27 m Draught,1.22 m Machinery, approximately 150 were built by American Car & Foundry and Higgins Industries. A Higgins LCM-3 is on display at the Battleship Cove maritime museum in Fall River, outwardly, the LCM was almost completely identical to a late model LCM - the difference lay inside the pontoon. Here special bilge pumps and special ballast tanks allowed the LCM to alter trim to increase stability when partially loaded, British model of LCM An LCM extended by 6 feet amidships. Many were later adapted as armoured troop carriers for the Mobile Riverine Force in the Vietnam War, power plant,2 Detroit 6-71 diesel engines,348 hp sustained, twin shaft, or 2 Detroit 8V-71 diesel engines,460 hp sustained, twin shaft Length,56

25.
LCPL
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The Landing Craft Personnel or LCP was a landing craft used extensively in the Second World War. Its primary purpose was to ferry troops from ships to attack enemy-held shores. The craft derived from a prototype designed by the Eureka Tug-Boat Company of New Orleans, Louisiana, manufactured initially in boatyards in and around New Orleans, as requirements grew it was produced in a number of yards around the United States. Typically constructed of planks and plywood, and fitted with some armor plate. Men generally entered the boat by walking over a gangplank from the deck of their troop transport as the LCP hung from its davits. When loaded, the LCP was lowered into the water, soldiers exited the boat by jumping or climbing down from the craft’s bow or sides. During the 1930s, the United States Marine Corps sought boats practical for landing troops on beaches, in 1936, the USMC conducted experiments with new types of boats, lighters, and launches. Many craft were considered coming from the Navy’s Bureau as well as fishing boat designs. Included in these experiments were some prototypes where, upon beaching, the craft was based on the company’s 1926 spoonbill-bowed craft used by trappers in the bayous of the Mississippi River delta. The boat’s draft was rather shallow,18 inches, and it could cut through vegetation and it could also run up on shore and extract itself damage-free. As part of demonstrations, boats were often run up on the seawalls of Lake Pontchartrain. The Marines specifications at the time were for boats operated by a crew of 6 that could carry a squad of 12 men, such boats should be able to achieve 15 knots, and to be hoisted on the US Navys standard davits. He produced the 32 feet Eureka or Higgins boat and this was the craft first used in American Fleet Landing Exercises in 1941. Before the USMC received their boats, the British Admiralty’s need for a raiding craft brought the first enquiries for a larger boat. Purchasing agents from Britain had become aware of Andrew Higgins’ Eureka boats, enquiries were made, the German occupation of France had changed British procurement plans dramatically. An initial order for 136 was placed, and the first 50 were delivered to Britain in October 1940, Higgins had already built these boats on spec and is said to have preferred this larger craft. Further US procurements were of this boat, and thus the LCP was the forerunner of all American LCP types. The LCPs were also known as Eurekas or R boats, before 1942, The USMC referred to them as T Boats

26.
LCVP (United States)
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The landing craft, vehicle, personnel or Higgins boat was a landing craft used extensively in amphibious landings in World War II. The craft was designed by Andrew Higgins based on boats made for operating in swamps, more than 20,000 were built, by Higgins Industries and licensees. Typically constructed from plywood, this shallow-draft, barge-like boat could ferry a platoon-sized complement of 36 men to shore at 9 knots. Men generally entered the boat by climbing down a cargo net hung from the side of their troop transport, they exited by charging down the boats bow ramp. Satisfactory in most respects, the major drawback appeared to be that equipment had to be unloaded. However, it was put into production and service as the craft, personnel. The LCP had two gun positions at the bow. The LCP, commonly called the U-boat or the Higgins boat, was supplied to the British, to whom it was known as the R-boat. Within one month, tests of the ramp-bow Eureka boat in Lake Pontchartrain showed conclusively that successful operation of such a boat was feasible and this boat became the Landing Craft, Personnel or LCP. The machine gun positions were still at the front of the boat, the design was still not ideal, because the ramp was a bottleneck for the troops, as was the case with the British Landing Craft Assault of the year before. The next step was to fit a full-width ramp, now troops could leave en masse and a small vehicle such as a Jeep could be carried, this new version became the LCVP, or simply, the Higgins boat. The machine gun positions were moved to the rear of the boat, at just over 36 ft long and just under 11 ft wide, the LCVP was not a large craft. Powered by a 225-horsepower Diesel engine at 12 knots, it would sway in choppy seas, since its sides and rear were made of plywood, it offered limited protection from enemy fire. The Higgins boat could hold either a 36-man platoon, a jeep and its shallow draft enabled it to run up onto the shoreline, and a semi-tunnel built into its hull protected the propeller from sand and other debris. The steel ramp at the front could be lowered quickly and it was possible for the Higgins boat to swiftly disembark men and supplies, reverse itself off the beach, and head back out to the supply ship for another load within three to four minutes. If Higgins had not designed and built those LCVPs, we never could have landed over an open beach, the whole strategy of the war would have been different. Only a few Higgins boats have survived, often with modifications for post-War use. A remarkably preserved Higgins boat, with the original Higgins motor, was discovered in a yard in Valdez, Alaska

27.
Captain's gig
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The captains gig /ˈɡɪɡ/ is a boat used on naval ships as the captains taxi. In general, during the era of wooden ships, it was smaller and lighter than the longboat and it was usually crewed by four oarsmen, and a coxswain. Generally the oarsmen sat one to a seat, but each only rowed a single oar on alternating sides, the gig was not as sea kindly as the longboat, but was used mostly in harbors. The gigs generally had a high wineglass transom, full skeg, full keel, straight stem, there was in general very little rocker in the keel. The gunwales on many were nearly straight from bow to stern and it appears to be the precursor to the Whitehall Rowboat. Some wooden captains gigs were quite large and were powered by sail, with the coming of metal ships and combustion engines the size of the captains gig increased and the boats could transport more sailors swiftly. Some modern built craft with sails have been named captains gig as well and these boats were typically painted with a white superstructure and gray hull with a red waterline stripe and black hull below the waterline. They would also frequently have the parent ships hull number marked on the port, in early 2008, in an economy move, Captains Gigs were eliminated from all U. S. Navy aircraft carriers. In science fiction, the term is used to refer to a small auxiliary spacecraft. In Star Trek, the craft are referred to as a captains yacht, cornish pilot gig, a larger boat which used to be used to transport pilots out to ships

28.
Deadweight tonnage
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Deadweight tonnage or tons deadweight is a measure of how much mass a ship is carrying or can safely carry, it does not include the weight of the ship. DWT is the sum of the weights of cargo, fuel, fresh water, ballast water, provisions, passengers, DWT is often used to specify a ships maximum permissible deadweight, although it may also denote the actual DWT of a ship not loaded to capacity. Deadweight tonnage is a measure of a weight carrying capacity. It should not be confused with displacement which includes the ships own weight, nor other volume or capacity measures such as gross tonnage or net tonnage

29.
5"/38 caliber gun
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The Mark 12 5/38 caliber gun was a US naval gun. The gun was installed into Single Purpose and Dual Purpose mounts used primarily by the US Navy, the 38 caliber barrel was a mid-length compromise between the previous United States standard 5/51 low-angle gun and 5/25 anti-aircraft gun. The increased barrel length provided greatly improved performance in both anti-aircraft and anti-surface roles compared to the 5/25 gun, however, except for the barrel length and the use of semi-fixed ammunition, the 5/38 gun was derived from the 5/25 gun. Both weapons had power ramming, which enabled rapid fire at high angles against aircraft, the 5/38 entered service on USS Farragut, commissioned in 1934. The base ring mount, which improved the rate of fire, entered service on USS Gridley. Even this advanced system required nearly 100 rounds of ammunition expenditure per aircraft kill, however, the planes were normally killed by shell fragments and not direct hits, barrage fire was used, with many guns firing in the air at the same time. Base ring mounts with integral hoists had a rate of fire of 15 rounds per minute per barrel, however. On pedestal and other mounts lacking integral hoists,12 to 15 rounds per minute was the rate of fire, useful life expectancy was 4600 effective full charges per barrel. The 5/38 cal gun was mounted on a large number of US Navy ships in the World War II era. It was backfitted to many of the World War I-era battleships during their wartime refits and it has left active US Navy service, but it is still on mothballed ships of the United States Navy reserve fleets. It is also used by a number of nations who bought or were given US Navy surplus ships, each mount carries one or two Mk 12 5/38cal Gun Assemblies. The gun assembly shown is used in single mounts, and it is the gun in twin mounts. It is loaded from the left side, the left gun in twin mounts is the mirror image of the right gun, and it is loaded from the right side. The Mk12 gun assembly weighs 3,990 lb, the major Mk12 Gun Assembly characteristics are,158 Semi-automatic During recoil, some of the recoil energy is stored in the counter-recoil system. That stored energy is used during counter-recoil to prepare the gun for the next round, the firing pin is cocked, the breech is opened, the spent powder case is ejected, and the bore is air cleaned. Hand loaded A Projectile-Man and a Powder-Man are stationed at each gun assembly and their job is to move the round, consisting of a projectile and a powder case, from the hoists to the rammer tray, and then start the ram cycle. The hydraulically driven Rammer Spade, called the Power Spade in that picture, is at the back of the Rammer Tray, if the multiple names of the Spade is confusing, look at this footnote. Vertical sliding-wedge breech block The breech block closes the chamber behind the powder case and it also holds the firing pin assembly

30.
Caliber (artillery)
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In artillery, caliber or calibre is the internal diameter of a gun barrel, or by extension a relative measure of the length. Rifled barrels introduce ambiguity to measurement of caliber, a rifled bore consists of alternating grooves and lands. The distance across the bore from groove to groove is greater than the distance from land to land, the depth of rifling grooves increases in larger calibers. United States Navy guns typically used rifling depth between one-half and one percent of caliber, projectile bourrelet diameter specification was 0.015 inches less than land to land diameter with a minus manufacturing tolerance so average clearance was about 0.012 inches. Driving band diameter was groove to groove diameter plus 0.02 inches, the length of the barrel is often quoted in calibers. For example, US Naval Rifles 3 in or larger, the effective length of the barrel is divided by the barrel diameter to give a dimensionless quantity.81 As an example, the main guns of the Iowa-class battleships can be referred to as 16/50 caliber. They are 16 inches in diameter and the barrel is 800 inches long, the bore to barrel length ratio is called caliber in naval gunnery,81 but is called length in army artillery. Before World War II, the US Navy used 5/51 caliber as surface-to-surface guns, by the end of World War II, the dual purpose 5/38 caliber was standard naval armament against surface and air targets. All three had a diameter of 5 inches. At sea, a weapon had to perform, without fail, there was no ready replacement, nor one that could be readily supplied. Over time, the terms of pound and bore became confused and blurred, eventually, when the technology existed, the bore came to be the standard measure. For naval rifles, the change was to actual bore. They then began to measure the length of the weapon in calibers. These were a measure of the bore of the barrel versus the rifled bore of the barrel. In other words, a 12/45 is 12×45= the length of the bore of that gun in inches. This explains the differences in both penetration and long range performance of naval rifles over the years. In addition to the improvements in overall performance, the increase in barrel length also allowed, in some circumstances. For example, the American 14/45, as introduced in the New York-class battleships, later improvements to the design, lengthening the rifle itself and also altering the breech, allowed a 1400 lb. projectile and, overall, a greater barrel life

31.
Dual-purpose gun
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A dual-purpose gun is a naval artillery mounting designed to engage both surface and air targets. The light A/A was dispersed throughout the ship and included both automatic cannons and heavy machine guns and they discarded the dedicated, anti-ship secondary batteries altogether, because a battle-line fleet would be screened against cruiser and destroyers most of the time. Rather, they replaced them with turret-mounted dual-purpose guns that could be used against both aircraft and ships and this arrangement was seen as more efficient, and was deemed adequate to meet anti-surface and anti-aircraft needs under most circumstances. Both navies were concerned of close-range torpedo attacks from enemy destroyers and torpedo boats, the French Navy used a mixed-calibre system, as well, but their secondary battery was dual-purpose. This tended to complicate ammunition supplies and render certain armament useless in some situations, dual-purpose guns are designed as a compromise between the heavy main armament of a surface combatant and dedicated anti-aircraft guns. Usually of a caliber, the gun is heavy enough to prove useful against surface targets including ships, surfaced submarines. For example, a Royal Navy battleship of the King George V class had sixteen QF Mark I5. 25-inch guns that could engage enemy ships or high level aircraft. Not all dual-purpose guns have high elevation, the determining factor was whether or not the mounting was provided with an anti-aircraft fire control system and a method for setting the time fuze in the A. A. warhead, fired by the gun. Starting with the Tribal class, the Royal Navy introduced a series of classes that had dual-purpose guns. XIX and later mountings limited to 40,50 or 55 degrees elevation, however, the guns were controlled by an A. A. fire control system, fire control and no on-mount fuze setters. Admiral Sir Philip Vian describes the use of 4, there was too little sea-room for full freedom of manoeuvre, and the aircrafts approach was screened by the rock walls. Junkers attacks persisted to the end, but the fire of the destroyers, not a ship received a direct hit, though some were damaged by the splinters from near misses. Dual-purpose guns, often abbreviated to DP guns, were designed as a secondary armament for large surface ships such as cruisers. Most DP mounted guns have calibers in the range from three to five inches, in British service the term HA/LA for High Angle/Low Angle was used

32.
Bofors 40 mm gun
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The Bofors 40 mm gun, often referred to simply as the Bofors gun, is an anti-aircraft/multi-purpose autocannon designed in the 1930s by the Swedish arms manufacturer AB Bofors. It was one of the most popular medium-weight anti-aircraft systems during World War II, a small number of these weapons remain in service to this day, and saw action as late as the Gulf War. In the post-war era the original design was not suitable for action against jet powered aircraft, so Bofors introduced a new model of more power. In spite of sharing almost nothing with the design other than the calibre and the distinctive conical flash hider. Although not as popular as the original L/60 model, the L/70 remains in service to this day, especially as a weapon for light armored vehicles. Bofors itself has been part of BAE Systems AB since March 2005, the Swedish Navy purchased a number of 2 pounder Pom-Poms from Vickers as anti-aircraft guns in 1922. The Navy approached Bofors about the development of a capable replacement. Bofors signed a contract in late 1928, Bofors produced a gun that was a smaller version of a 57 mm semi-automatic gun developed as an anti-torpedo boat weapon in the late 19th century by Finspong. Their first test gun was a re-barreled Nordenfelt version of the Finspong gun, testing of this gun in 1929 demonstrated that a problem existed feeding the weapon in order to maintain a reasonable rate of fire. A mechanism that was enough to handle the stresses of moving the large round was too heavy to move quickly enough to fire rapidly. One attempt to solve this problem used zinc shell cases that burned up when fired and this proved to leave heavy zinc deposits in the barrel, and had to be abandoned. This seemed to be the solution they needed, improving firing rates to a level. During this period Krupp purchased a share of Bofors. Krupp engineers started the process of updating the Bofors factories to use equipment and metallurgy. The prototype was completed and fired in November 1931, and by the middle of the month it was firing strings of two and three rounds. Changes to the mechanism were all that remained, and by the end of the year it was operating at 130 rounds per minute. Continued development was needed to turn it into a suitable for production. Since acceptance trials had been passed the year before, this known as the 40 mm akan M/32

33.
Anti-aircraft warfare
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Anti-aircraft warfare or counter-air defence is defined by NATO as all measures designed to nullify or reduce the effectiveness of hostile air action. They include ground-and air-based weapon systems, associated sensor systems, command and control arrangements and it may be used to protect naval, ground, and air forces in any location. However, for most countries the main effort has tended to be homeland defence, NATO refers to airborne air defence as counter-air and naval air defence as anti-aircraft warfare. Missile defence is an extension of air defence as are initiatives to adapt air defence to the task of intercepting any projectile in flight, a surface-based air defence capability can also be deployed offensively to deny the use of airspace to an opponent. Until the 1950s, guns firing ballistic munitions ranging from 20 mm to 150 mm were the weapons, guided missiles then became dominant. The term air defence was probably first used by Britain when Air Defence of Great Britain was created as a Royal Air Force command in 1925. However, arrangements in the UK were also called anti-aircraft, abbreviated as AA, after the First World War it was sometimes prefixed by Light or Heavy to classify a type of gun or unit. Nicknames for anti-aircraft guns include AA, AAA or triple-A, an abbreviation of anti-aircraft artillery, ack-ack, NATO defines anti-aircraft warfare as measures taken to defend a maritime force against attacks by airborne weapons launched from aircraft, ships, submarines and land-based sites. In some armies the term All-Arms Air Defence is used for air defence by nonspecialist troops, other terms from the late 20th century include GBAD with related terms SHORAD and MANPADS. Anti-aircraft missiles are variously called surface-to-air missile, abbreviated and pronounced SAM, non-English terms for air defence include the German FlaK, whence English flak, and the Russian term Protivovozdushnaya oborona, a literal translation of anti-air defence, abbreviated as PVO. In Russian the AA systems are called zenitnye systems, in French, air defence is called DCA. The maximum distance at which a gun or missile can engage an aircraft is an important figure, however, many different definitions are used but unless the same definition is used, performance of different guns or missiles cannot be compared. For AA guns only the part of the trajectory can be usefully used. By the late 1930s the British definition was that height at which an approaching target at 400 mph can be engaged for 20 seconds before the gun reaches 70 degrees elevation. However, effective ceiling for heavy AA guns was affected by nonballistic factors, The maximum running time of the fuse, the capability of fire control instruments to determine target height at long range. The essence of air defence is to detect aircraft and destroy them. The critical issue is to hit a target moving in three-dimensional space, Air defence evolution covered the areas of sensors and technical fire control, weapons, and command and control. At the start of the 20th century these were very primitive or non-existent

34.
Oerlikon 20 mm cannon
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The Oerlikon 20 mm cannon is a series of autocannons, based on an original German 20 mm Becker design that appeared very early in World War I. It was widely produced by Oerlikon Contraves and others, with various models employed by both Allied and Axis forces during World War II, and many still in use today. During World War I, the German Reinhold Becker developed a 20 mm caliber cannon and this used a 20x70 RB cartridge and had a cyclic rate of fire of 300 rpm. It was used on a scale as an aircraft gun on Luftstreitkräfte warplanes. Because the Treaty of Versailles banned further production of weapons in Germany. SEMAG continued development of the weapon, and in 1924 had produced the SEMAG L, the Oerlikon firm, named after the Zürich suburb where it was based, then acquired all rights to the weapon, plus the manufacturing equipment and the employees of SEMAG. In 1927 the Oerlikon S was added to the product line. This fired a larger cartridge to achieve a muzzle velocity of 830 m/s, at the cost of increased weight. The purpose of development was to improve the performance of the gun as an anti-tank and anti-aircraft weapon. An improved version known as the 1S followed in 1930, three sizes of gun with their different ammunition and barrel length, but very similar mechanisms, continued to be developed in parallel. In 1930 Oerlikon reconsidered the application of its gun in aircraft and introduced the AF and AL, designed to be used in flexible mounts, the 15-round box magazine used by earlier versions of the gun was replaced by drum magazine holding 15 or 30 rounds. In 1935 it made an important step by introducing a series of guns designed to be mounted in or on the wings of fighter aircraft, designated with FF for Flügelfest meaning wing-mounted, these weapons were again available in the three sizes, with designations FF, FFL and FFS. The FF fired a larger cartridge than the AF, 20x72RB. The FF weighed 24 kg and achieved a velocity of 550 to 600 m/s with a rate of fire of 520 rpm. The FFL of 30 kg fired a projectile at a velocity of 675 m/s with a rate of fire of 500 rpm. And the FFS, which weighed 39 kg, delivered a high velocity of 830 m/s at a rate of fire of 470 rpm. Apart from changes to the design of the guns for wing-mounting and remote control, for the FF series drum sizes of 45,60,75 and 100 rounds were available, but most users chose the 60-round drum. The 1930s were a period of global re-armament, and a number of foreign firms took licenses for the Oerlikon family of aircraft cannon

35.
Battle of Iwo Jima
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The Battle of Iwo Jima was a major battle in which the United States Marine Corps landed on and eventually captured the island of Iwo Jima from the Japanese Imperial Army during World War II. This five-week battle comprised some of the fiercest and bloodiest fighting of the War in the Pacific of World War II, after the heavy losses incurred in the battle, the strategic value of the island became controversial. It was useless to the U. S. Army as a staging base, however, Navy Seabees rebuilt the landing strips, which were used as emergency landing strips for USAAF B-29s. The Imperial Japanese Army positions on the island were heavily fortified, with a network of bunkers, hidden artillery positions. The American ground forces were supported by naval artillery, and had complete air supremacy provided by U. S. Navy. Japanese combat deaths numbered three times the number of American deaths, although uniquely among Pacific War Marine battles, American total casualties exceeded those of the Japanese. Of the 21,000 Japanese soldiers on Iwo Jima at the beginning of the battle, only 216 were taken prisoner, despite the bloody fighting and severe casualties on both sides, the Japanese defeat was assured from the start. Joe Rosenthals Associated Press photograph of the raising of the U. S. flag on top of the 169 m Mount Suribachi by six U. S, Marines became an iconic image of the battle and the American war effort in the Pacific. All indications pointed to an American drive toward the Mariana Islands, in March 1944, the Japanese 31st Army, commanded by General Hideyoshi Obata, was activated to garrison this inner line. The commander of the Japanese garrison on Chichi Jima was placed nominally in command of Army, after the American conquest of the Marianas, daily bomber raids from the Marianas hit the mainland as part of Operation Scavenger. Iwo Jima served as an early warning station that radioed reports of incoming bombers back to mainland Japan and this allowed Japanese air defenses to prepare for the arrival of American bombers. At the same time, with reinforcements arriving from Chichi Jima and the home islands, in addition, it was used by the Japanese to stage air attacks on the Mariana Islands from November 1944 through January 1945. The capture of Iwo Jima would eliminate these problems and provide an area for Operation Downfall – the eventual invasion of the Japanese Home Islands. The distance of B-29 raids could be cut in half, American intelligence sources were confident that Iwo Jima would fall in one week. In light of the intelligence reports, the decision was made to invade Iwo Jima. American forces were unaware that the Japanese were preparing a complex and deep defense, by June 1944, Lieutenant General Tadamichi Kuribayashi was assigned to command the defense of Iwo Jima. While drawing inspiration from the defense in the Battle of Peleliu, takeichi Nishis armored tanks were to be used as camouflaged artillery positions. This network of bunkers and pillboxes favored the defense, for instance, The Nanpo Bunker, which was located east of Airfield Number 2, had enough food, water and ammo for the Japanese to hold out for three months

36.
Battle of Okinawa
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The 82-day-long battle lasted from 1 April until 22 June 1945. The Tenth was unique in that it had its own air force. The battle has been referred to as the typhoon of steel in English, the nicknames refer to the ferocity of the fighting, the intensity of Japanese kamikaze attacks, and the sheer numbers of Allied ships and armored vehicles that assaulted the island. The battle was one of the bloodiest in the Pacific, with an total of over 82,000 direct casualties on both sides,14,009 Allied deaths and 77,417 Japanese soldiers. Allied grave registration forces counted 110,071 dead bodies of Japanese soldiers,149,425 Okinawans were killed, committed suicide or went missing, a significant proportion of the estimated pre-war 300,000 local population. As part of the operations surrounding the battle, the Japanese battleship Yamato was sunk. After the battle, Okinawa provided an anchorage, troop staging areas. Expeditionary Troops under Lieutenant General Simon Bolivar Buckner, Jr. with Tenth Army, TF56 was the largest force within TF50 and was built around the 10th Army. The army had two corps under its command, III Amphibious Corps, consisting of 1st and 6th Marine Divisions, the 2nd Marine Division was an afloat reserve, and Tenth Army also controlled the 27th Infantry Division, earmarked as a garrison, and 77th Infantry Divisions. In all, the Army had over 102,000 soldiers, at the start of Battle of Okinawa 10th Army had 182,821 men under its command. It was planned that General Buckner would report to Turner until the phase was completed. Although Allied land forces were composed of U. S. units. Although all the carriers were provided by Britain, the carrier group was a combined British Commonwealth fleet with British, Canadian, New Zealand and Australian ships. Their mission was to neutralize Japanese airfields in the Sakishima Islands, most of the air-to-air fighters and the small dive bombers and strike aircraft were U. S. Navy carrier-based airplanes. The Japanese land campaign was conducted by the 67, 000-strong regular 32nd Army and some 9,000 Imperial Japanese Navy troops at Oroku naval base, supported by 39,000 drafted local Ryukyuan people. The Japanese had used kamikaze tactics since the Battle of Leyte Gulf, between the American landing on 1 April and 25 May, seven major kamikaze attacks were attempted, involving more than 1,500 planes. The 32nd Army initially consisted of the 9th, 24th, and 62nd Divisions, the 9th Division was moved to Taiwan prior to the invasion, resulting in shuffling of Japanese defensive plans. Primary resistance was to be led in the south by Lt. General Mitsuru Ushijima, his chief of staff, Lieutenant General Isamu Chō and his chief of operations, Yahara advocated a defensive strategy, whilst Chō advocated an offensive one

37.
Combat Action Ribbon
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The Combat Action Ribbon, is a United States Navy and United States Coast Guard military decoration. The Coast Guard CAR was authorized on 16 July 2008 and may be awarded to members of the Coast Guard in the grade of captain and below, who have actively participated in ground or maritime combat. The Navy Combat Action Ribbon is retroactive to 7 December 1941, the Combat Action Ribbon is awarded only to individual service members. The CAR is not awarded to a unit, station. To be considered for a Combat Action Ribbon, evidence must establish the military member engaged the enemy, was under hostile fire, a service members mere presence in an area where combat is occurring or in a designated combat zone does not qualify the member for the award. The Combat Action Ribbon is an award, unlike other services. Compare, The U. S. Army equivalent to the Combat Action Ribbon is the Combat Action Badge, Combat Infantryman Badge, a U. S. Air Force combat participant is awarded the Air Force Combat Action Medal. The Combat Action Ribbon is worn in order of precedence on a members ribbon rack displayed on the side of a service members uniform. Only one Combat Action Ribbon is authorized, additional combat action awards are signified with an appropriate 5⁄16 inch gold star attached to the CAR. Some private companies selling replacement decorations or awards also advertise for sale, e. g. a commemorative combat action medal, combat tribute, some medallions are stylized from elements of various military combat action awards. Such medallions are considered decorative, have no military significance or recognition. The CAR is currently authorized with a U. S. Navy, the Navy version covers the Navy and Marine Corps service members from when the CAR was established in 1969, and made retroactive from December 7,1941 forward. Year 2009 forward, Coast Guard members who perform in combat are awarded the Coast Guard Combat Action Ribbon. The Navy Combat Action Ribbon was established during the Vietnam War by a Secretary of the Navy Notice, dated February 17,1969 with retroactive award to March 1,1961. The Navy CAR is awarded to members of the Navy and Marine Corps, and Coast Guard personnel with the grade of captain/colonel and below, sailors and Marines in clandestine or special operations where their ability to return fire is curtailed may be deemed eligible. Previously it applied only to exposure to IEDs detonated by the enemy, eligibility under this criterion is retroactive only to 7 October 2001. Additional awards of the Navy CAR are denoted by 5⁄16 inch gold stars on the ribbon, World War II and Korean War In October 1999, World War II and Korean War veterans became retroactively eligible for the Navy Combat Action Ribbon by Public Law 106-65 on Oct. Two specific blocks of time were designated by then SECNAV Danzig, Dec.7

38.
American Campaign Medal
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The American Campaign Medal is a military award of the United States Armed Forces which was first created on November 6,1942 by Executive Order 9265 issued by President Franklin D. Roosevelt. The medal was intended to recognize those military members who had performed military service in the American Theater of Operations during World War II. A similar medal, known as the American Defense Service Medal was awarded for active duty prior to the United States entry into World War II. The American Campaign Medal was established per Executive Order 9265,6 November 1942, by President Franklin D. Roosevelt and announced in War Department Bulletin 56,1942. The criteria was initially announced in Department of the Army Circular 1, dated 1 January 1943, the criteria for the medal was announced in DA Circular 84, dated 25 March 1948 and subsequently published in Army Regulation 600-65, dated 22 September 1948. The American Campaign Medal was issued as a ribbon only during the Second World War. The first recipient of the American Campaign Medal was General of the Army George C, marshall, Jr. Permanently assigned as a member of a crew of a vessel sailing ocean waters for a period of 30 consecutive days or 60 nonconsecutive days. Outside the continental limits of the United States in a status or on temporary duty for 30 consecutive days or 60 nonconsecutive days. Within the continental limits of the United States for a period of 1 year. The medal, made of bronze, is 1 1/4 inches wide, the obverse was designed by Thomas Hudson Jones. It shows a Navy cruiser underway with a B-24 Liberator bomber flying overhead, in the foreground is a sinking enemy submarine, and in the background is the skyline of a city. At the top of the medal are the words AMERICAN CAMPAIGN and it depicts an American bald eagle between the dates 1941 -1945 and the words UNITED STATES OF AMERICA. The ribbon is 1 3/8 inches wide in oriental blue in the center is a 1/8 inch center stripe divided into thirds of old glory blue, white, between the center and the edges are stripes of 1/16 inch in white, black, scarlet and white. 3/16 inch service stars were authorized to service members who participated in combat with Axis forces within the American Theater and this primarily applied to those service members whose units participated in anti-U-Boat patrols in the Atlantic. To qualify individuals must have been assigned to or attached to, and present for duty with, a complete guide to all United States military medals,1939 to present. Robles, Philip K. United States military medals and ribbons

39.
World War II Victory Medal (United States)
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The World War II Victory Medal was first issued as a service ribbon referred to as the “Victory Ribbon. ”By 1946, a full medal had been established which was referred to as the World War II Victory Medal. The corresponding medal from the World War I is the World War I Victory Medal, on 8 August 1946, the separate Merchant Marine World War II Victory Medal was established for members of the United States Merchant Marine who served during World War II. The medal is awarded for service between 7 December 1941 and 31 December 1946, both dates inclusive, the National Personnel Records Center has reported some cases of service members receiving the award for simply a few days of service. As the Second World War ended on 2 September 1945, there may be cases of members who had enlisted, entered officer candidate school. Military Academy, the U. S. Naval Academy or the U. S. Coast Guard Academy in 1946, the reason for this late date is that President Harry S. Truman did not declare an official end of hostilities until the last day of 1946. The bronze medal is 1 3⁄8 inches in width, the rainbow on each side of the ribbon is a miniature of the pattern used in the World War I Victory Medal. Although the World War I Victory Medal included clasps, the World War II Victory Medal did not and this was because campaign medals were frequently awarded instead. Awards and decorations of the United States military Merchant Marine World War II Victory Medal United States Statutes at Large, washington, DC, Office of the Federal Register. Washington, DC, Office of the Federal Register, navPers 15,790, Navy and Marine Corps Awards Manual. Washington, DC, Department of the Navy, mIL-DTL-3943/237A, Detail Specification Sheet — Medal, World War II Victory. MIL-DTL-11589/149E, Detail Specification Sheet — Ribbon, World War II Victory Medal, fort Belvoir, Virginia, The Institute of Heraldry, U. S. Army. Archived from the original on September 9,2009

40.
Navy Occupation Service Medal
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The medal was also bestowed to personnel who performed duty in West Berlin between 1945 and 1990. No more than one Navy Occupation Service Medal may be awarded to an individual, the Army of Occupation Medal is the equivalent of the Navy Occupation Service Medal. No person could receive both the Army and Navy occupation medals, the medal was designed by A. A. Weinman. It depicts Neptune riding a Hippocampus with the words Occupation Service, the reverse has the words United States Navy and is the same as that of the Dominican Campaign Medal. The medal is authorized two service clasps, Europe and Asia, the clasps are rectangular with a rope border. If eligible, both clasps may be worn on the medal, the Berlin Airlift Device is also authorized to those Naval personnel who have served 90 days or more with an accredited unit in support of the Berlin Airlift between 1948 and 1949. The following geographical duty areas, and time frames of eligibility, the Asia clasp was authorized for any service performed on shore or on ships in the following geographical duty areas and time frames of eligibility. Service after June 27,1950 which is eligible towards the criteria for the Korean Service Medal may not be considered for the Occupation Service Medal. Army of Occupation Medal Awards and decorations of the United States military Navy History & Heritage Command-Navy Occupation Service Medal SECNAVINST1650. 1H Chapter 8, § 3-831-5

41.
United States Navy
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The United States Navy is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The U. S. Navy is the largest, most capable navy in the world, the U. S. Navy has the worlds largest aircraft carrier fleet, with ten in service, two in the reserve fleet, and three new carriers under construction. The service has 323,792 personnel on duty and 108,515 in the Navy Reserve. It has 274 deployable combat vessels and more than 3,700 operational aircraft as of October 2016, the U. S. Navy traces its origins to the Continental Navy, which was established during the American Revolutionary War and was effectively disbanded as a separate entity shortly thereafter. It played a role in the American Civil War by blockading the Confederacy. It played the role in the World War II defeat of Imperial Japan. The 21st century U. S. Navy maintains a global presence, deploying in strength in such areas as the Western Pacific, the Mediterranean. The Navy is administratively managed by the Department of the Navy, the Department of the Navy is itself a division of the Department of Defense, which is headed by the Secretary of Defense. The Chief of Naval Operations is an admiral and the senior naval officer of the Department of the Navy. The CNO may not be the highest ranking officer in the armed forces if the Chairman or the Vice Chairman of the Joint Chiefs of Staff. The mission of the Navy is to maintain, train and equip combat-ready Naval forces capable of winning wars, deterring aggression, the United States Navy is a seaborne branch of the military of the United States. The Navys three primary areas of responsibility, The preparation of naval forces necessary for the prosecution of war. The development of aircraft, weapons, tactics, technique, organization, U. S. Navy training manuals state that the mission of the U. S. Armed Forces is to prepare and conduct prompt and sustained combat operations in support of the national interest, as part of that establishment, the U. S. Navys functions comprise sea control, power projection and nuclear deterrence, in addition to sealift duties. It follows then as certain as that night succeeds the day, that without a decisive naval force we can do nothing definitive, the Navy was rooted in the colonial seafaring tradition, which produced a large community of sailors, captains, and shipbuilders. In the early stages of the American Revolutionary War, Massachusetts had its own Massachusetts Naval Militia, the establishment of a national navy was an issue of debate among the members of the Second Continental Congress. Supporters argued that a navy would protect shipping, defend the coast, detractors countered that challenging the British Royal Navy, then the worlds preeminent naval power, was a foolish undertaking. Commander in Chief George Washington resolved the debate when he commissioned the ocean-going schooner USS Hannah to interdict British merchant ships, and reported the captures to the Congress

42.
Commander (United States)
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In the United States, commander is a military rank that is also sometimes used as a military billet title, depending on the branch of service. It is also used as a rank or title in some organizations outside the military, particularly in police, the commander rank started out as Master and Commander in 1674 within the British Navy for the officer responsible for sailing a ship under the Captain and some times second-in-command. Sub-captain, under-captain, rector and master-commanding was also used for the same position, with the Master and Commander also serving as captain of smaller ships, the British Navy subsumed as the third and lowest of three grades of captain given the various sizes of ships. The American Continental Navy adopted the tri-graded captain ranks, Captain 2nd Grade, or Master Commandant, became Commander in 1838. Commander ranks above lieutenant commander and below captain, Commander is equivalent to the rank of lieutenant colonel in the other uniformed services. Notably, it is the first rank at which the holder wears an embellished cap, whereas officers of the other services are entitled to embellishment at O-4 rank. A commander in the U. S. Navy may command a frigate, destroyer, submarine, aviation squadron or small shore activity, or may serve on a staff afloat or ashore, or a larger vessel afloat. An officer in the rank of commander who commands a vessel may also be referred to as captain as a courtesy title, commanding officers of aviation squadrons and shore activities may also be informally referred to as skipper but never as captain. Although it exists largely as a training organization, the U. S. Maritime Service also has the grade of commander. The commission is appointed by the President via the Secretary of Transportation, for example, the senior officer in a U. S. Navy aviation squadron is the commanding officer because he or she is in command of that singular unit. That officers immediate superior in command will likely be an air group or air wing commander and this is in keeping with the naval tradition of commanding officers commanding single units, but commanders commanding multiple units. The Los Angeles Police Department was one of the first American police departments to use this rank, a commander is the third-highest rank in the force, above the rank of captain and below deputy chief. Duties are as commanding officer of Community Affairs, Internal Affairs, Governmental Liaison, Narcotics, Organized Crime and Vice, Criminal Intelligence, Detective Services, the San Francisco Police Department also has a Commander rank. Like the LAPD, it is above Captain and below Deputy Chief, the Metropolitan Police Department of the District of Columbia uses the rank of commander. The rank falls between those of inspector and assistant chief, the Rochester Police Department uses the rank of commander. Higher than captain and below deputy chief, the rank is achieved by appointment, Commander is the rank held by the two patrol division heads and other commanders fill various administrative roles. The Saint Paul Police Department is another force that uses the rank of commander. In the Saint Paul Police Department, commanders serve as the chief of the district/unit that they oversee, many police departments in the Midwest use the rank of commander

43.
United States Navy Reserve
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The United States Navy Reserve, known as the United States Naval Reserve from 1915 to 2005, is the Reserve Component of the United States Navy. Members of the Navy Reserve, called Reservists, are enrolled in the Selected Reserve, the Individual Ready Reserve, the size of these centers varies greatly, depending on the number of assigned. They are intended mostly to administrative functions and classroom style training. However, some NOSCs have more training facilities, including damage control trainers. Because of this, NOSCs outside the concentration areas are also heavily tasked to provide personnel. This service provided to the community is one of the NOSCs top two priority missions. FTS, previously known as TAR, serve in all year round and provide administrative support to SELRES. Army Reserve and the Army National Guard, the IRR do not typically drill or train regularly, but can be recalled to service in a full mobilization. These personnel will drill for points but no pay and are not eligible for Annual Training with pay, however, they remain eligible for other forms of active duty with pay and mobilization. Reservists are called to duty, or mobilized, as needed and are required to sign paperwork acknowledging this possibility upon enrollment in the reserve program. After the September 11 attacks of 2001, Reservists were mobilized to combat operations. The War on Terrorism has even seen the activation of a Reserve squadron, the VFA-201 Hunters, flying F/A-18 Hornet aircraft, which deployed on board the USS Theodore Roosevelt. Additionally, more than 52,000 Navy Reservists have been mobilized and deployed to serve in Iraq and Afghanistan, the Reserve consists of 108,718 officers and enlisted personnel who serve in every state and territory as well as overseas as of September 2012. S. Following the American Revolution, the expense of maintaining a navy was deemed too great. However, attacks by Barbary pirates against American merchant vessels in the Mediterranean Sea prompted a change in course in 1794, a navy that helped give birth to the nation was now deemed essential to preserving its security, which faced its most serious threat during the War of 1812. Though overwhelmed by a superior in numbers, these men, most recruited from Baltimore, continued to wage war on land, joining in the defense of Washington. Having fought against a power, naval reservists faced a much different struggle with the outbreak of the Civil War, which divided a navy. By wars end the Navy had grown from a force numbering 9,942 in 1860 to one manned by 58,296 sailors, the latter action resulted in the awarding of the Medal of Honor to six reserve enlisted men

44.
Pearl Harbor
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Pearl Harbor is a lagoon harbor on the island of Oahu, Hawaii, west of Honolulu. Much of the harbor and surrounding lands is a United States Navy deep-water naval base and it is also the headquarters of the United States Pacific Fleet. The U. S. government first obtained exclusive use of the inlet, the attack on Pearl Harbor by the Empire of Japan on December 7,1941, was the immediate cause of the United States entry into World War II. Pearl Harbor was originally a shallow embayment called Wai Momi or Puʻuloa by the Hawaiians. Puʻuloa was regarded as the home of the goddess, Kaʻahupahau. Making due allowance for legendary amplification, the estuary already had an outlet for its waters where the present gap is, during the early 19th century, Pearl Harbor was not used for large ships due to its shallow entrance. The interest of United States in the Hawaiian Islands grew as a result of its whaling, shipping and trading activity in the Pacific. As early as 1820, an Agent of the United States for Commerce and these commercial ties to the American continent were accompanied by the work of the American Board of Commissioners for Foreign Missions. American missionaries and their families became a part of the Hawaiian political body. Throughout the 1820s and 1830s, many American warships visited Honolulu, in most cases, the commanding officers carried letters from the U. S. Government giving advice on governmental affairs and of the relations of the island nation with foreign powers. In 1841, the newspaper Polynesian, printed in Honolulu, advocated that the U. S. establish a base in Hawaii for protection of American citizens engaged in the whaling industry. The British Hawaiian Minister of Foreign Affairs Robert Crichton Wyllie, remarked in 1840 that and my opinion is that the tide of events rushes on to annexation to the United States. In 1865, the North Pacific Squadron was formed to embrace the western coast, lackawanna in the following year was assigned to cruise among the islands, a locality of great and increasing interest and importance. This vessel surveyed the Northwestern Hawaiian Islands toward Japan, as a result, the United States claimed Midway Island. The Secretary of the Navy was able to write in his report of 1868. This increased activity caused the permanent assignment of at least one warship to Hawaiian waters and it also praised Midway Island as possessing a harbor surpassing Honolulus. In the following year, Congress approved an appropriation of $50,000 on March 1,1869, after 1868, when the Commander of the Pacific Fleet visited the islands to look after American interests, naval officers played an important role in internal affairs. They served as arbitrators in disputes, negotiators of trade agreements and defenders of law

45.
4th Marine Division (United States)
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The 4th Marine Division is a reserve division in the United States Marine Corps. It is the combat element of the Marine Forces Reserve and is headquartered in New Orleans. This division was formed by the organization and redesignation of several other units, in March the 24th Marine Regiment was organized, and then in May it was split in two to supply the men for the 25th Marines. This war-time shuffling provided the building blocks for a new division. The units were separated, however, with the 24th Marines. The rest of the units were at Camp Lejeune, North Carolina and this East Coast echelon moved to Pendleton by train and transit of the Panama Canal in July and August. When all the units were finally together, the 4th Marine Division was formally activated on August 14,1943 and it was awarded two Presidential Unit Citations and a Navy Unit Commendation, and then deactivated 28 November 1945. The division patch worn on Saipan had a gold 4 on a scarlet background, the emblem was designed by SSgt John Fabion, a member of the Divisions Public Affairs Office before the Marshalls Campaign. Major General Harry Schmidt Major General Clifton B, cates Brigadier General James L. Underhill Brigadier General Samuel C. Cumming Brigadier General Franklin A. Hart Colonel William W. Rogers Colonel Matthew C. Background, Early in 1962, Secretary of Defense Robert S. McNamara indicated to the Congress that he wanted the Marine Corps to have a fourth division/wing team, to be formed of Ready Reserves. In April of that year, the Commandant of the Marine Corps announced a reorganization of the Marine Corps Reserve to be effective 1 July 1962. In this reorganization,53 reserve units were redesignated as 4th Marine Division units, Major General Robert E. Cushman, Jr. commanding general of Camp Pendleton was given the additional responsibility as the commanding general of the division. On 23 June 1966, the World War II division colors were presented to General Cushman, significantly at a 4th Marine Division Association meeting at Camp Pendleton, California. Reminiscent of a torch, a new generation of Marines was eager to prove itself worthy of the trust attendant in the acceptance of the proud colors. Even before the nucleus had been formed, still other changes were on the drawing board. In late 1965, the Commandant approved a plan to reorganize the Organized Marine Corps Reserve so that the division/wing team would become a mirror image of its regular counterparts. The first step toward achieving this goal was to reorganize the 4th Marine Aircraft Wing so that it would reflect an active wing, all of these changes were made by 15 July 1970 when Brigadier General Leo J. Dulacki arrived to take command of the division. One month later, General Dulacki was promoted to major general, the nucleus designation was dropped with the command unit now being designated as Headquarters, 4th Marine Division

A propeller is a type of fan that transmits power by converting rotational motion into thrust. A pressure difference is …

Propeller on a modern mid-sized merchant vessel. The propeller rotates clockwise to propel the ship forward when viewed from astern (right of picture); the person in the picture has his hand on the blade's trailing edge.

Smith's original 1836 patent for a screw propeller of two full turns. He would later revise the patent, reducing the length to one turn.

A replica of SS Great Britain's first propeller was created for this museum ship. The real propeller was replaced with a four-bladed model in 1845. The SS Great Britain was initially designed to have paddles but the design was modified after screw propellers were proven to be more effective and efficient.

The Landing Craft Personnel (Large) or LCP (L) was a landing craft used extensively in the Second World War. Its …

Image: Reinforcements land on Guadalcanal

A Eureka Boat, an early model of the LCP(L), used in commando raids. This image features Jack Churchill leading a charge armed with a broadsword (far right).

This boat, an early example from the Eureka Tug-Boat Company, was the progenitor of thousands of Second World War landing craft.

US Marines climb down a scramble net to an LCP(L) during preparations in the Fiji Islands for the Guadalcanal Campaign that would take place in August 1942. These men appear to be filling a returned craft as first wave troops would have entered the boat prior to its being lowered to the water.

The Bofors 40 mm gun, often referred to simply as the Bofors gun, is an anti-aircraft/multi-purpose autocannon designed …

British Bofors 40 mm L/60 on a 360 degree turret mount, England.

Finnish Bofors 40 mm. This gun mounts the original reflector sights, and lacks the armor found on British examples.

British 40mm L/60 includes the British-designed Stiffkey Sight, being operated by the gun layer standing on the right. The layer operates the trapeze seen above the sights, moving them to adjust for lead. The loader stands to the layer's left, and the two trainer/aimers are sitting on either side of the gun.